Door lock



Aug. 15,1939 l A. L. HANSEN 1 DOOR LOCK Filed March 14, 1958 Il r/jllPatented Aug. 15, 1939 eA'rENT omer DOOR. LQCK l Augie L. Hansen,Chicago, Ill., assignor to A. L. Hansen Mfg. Co'.,l Chicago, Ill., acorporation 'of Illinois Application March 14,

1 Claim'.

This invention relates to improvements in multiple door locksparticularly adapted for automobile bodies of the commercial type,although not limited to such use.

The principal object of the invention is to provide an improved andsimple locking mechanism having a plurality of locking bolts operated byaisingle handle and having a snap action so that the lock will bepositively moved either into fully cpe-ned or fully closed position.

Other objects and advantages of the invention will appear from thefollowing description.

rlf'he invention may best be understood by reference to the accompanyingdrawing, in which Fig, l is a perspective fragmentary view of anautomobile body to which an embodiment of my invention has been applied.

Fig. 2 is an enlarged fragmentary side View of the door and lock shownin Fig. 1, with the mechanism in unlocked position.

Fig. 3 is an inside face view of the door and lock shown in Fig. 2.

Fig. 4 is a detail section taken on line 4-4 of Fig. 2, and showing thelocking mechanism in locked position.

Fig. 5 is a detail perspective View of the cover plate forming part ofthe locking mechanism.

Fig. 6 is a fragmentary detail View from the outside of the door showingthe locking handle in closed position.

In the embodiment of the invention illustrated in the drawing, I6indicates the rear door of a commercial automobile body to which myimproved locking mechanism is appiled; II, II indicate opposed doorframe members having suitable keeper plates I2, I2 in position to beengaged by the end locking bolts I3 and |33; and I4 indicates a suitableabutment adapted to be engaged by a swinging bolt or locking piece I5 atthe center of the door. The abutment I4 may be either a fixed door framemember, or the edge of another swinging door having as usual separatelatch or fastening means therefor.

The locking mechanism includes an elongated base plate 24J disposedadjacent the inner edge of the door approximately at the center thereof,and a cover plate 2| having its central portion spaced in parallelrelation thereto. In the form shown, the plates 20 and 2| are bothsecured-to the door by bolts 22, 22 at opposite ends thereof. An outerplate 25 is secured to the exposed face of the door, and a shaft 26having a handle 21 mounted thereon extends through said outer plate,door l0 and base plate 26, and bearing aperture 2|a of the cover plate2|. (See Fig. 4.)

193s, lserial No- 195,803

A locking piece I5 consisting of a relatively flat rectangular piece ofmetal is fixed on the inner end of the shaft 26, as by a set screw 28passing through a boss 29 projecting from the outer face o-f saidlocking piece I5, as viewed from the interior of the doo-r. It will beobserved that the locking piece I5 is pivotally mounted on shaft 26nearer one end of the base plate 26 and cove:l plate 2|, so that theelongated locking portion I5a of said locking piece may be swunginwardly beneath the cover plate 2| when the locking piece is inunlocked position, as shown in Fig. 3.

The locking piece I5 has a pair of pivot pins 36 and 3| mounted inbosses 36*l and SIE, respectively, disposed at opposite sides and inalignment with the pivotal axis of the locking piece I5 and at an angleof approximately 45 degrees to the longitudinal axis of said lockingpiece, as clearly seen in Fig. 4. The pins 30 and 3| project beyond thecover plate 2| at opposite sides thereof, in. the form shown herein, thesaid cover plate having arcuate shaped notches 34 and 35 formed in itsopposite edges to accommodate the pins 30 and 3|, respectively, and formstops to limit the pivotal movement of said locking piece. A pair of tierods 36 and 31 are pivotally mounted on the outer ends o-f pins 30 and3|, respectively, and extend in opposite directions along the edge ofthe door to locking bolts I3 and |321. Each of said locking bolts islongitudinally slidable in an elongated guide member 38 secured adjacentthe edge of the door I0.

Each of the rods 36 and 31 is preferably connected to its respectivebolt I3 and I3a by inserting its outer end in a drilled hole 46extending lengthwise of said bolt and securing the rod and bolt inproper adjusted position by a set screw 4I. In the form. shown herein, aportion of the side wall of each :guide member 38 is cut away asindicated at 42, to accommodate the set screw 4I carried by the lockingbolt as the latter is moved into its extended locking position.

A leaf spring 45 is interposed between the outer face of the cover plate2| and the inner faces of the rods 36 and 31, and is held in place bypins 36 and 3| which pass through opposite ends thereof so as to swingbodily with the locking piece I5. Said spring 45 is normally flexedoutwardly at its ends so as to urge the rods 36 and 31 outwardly andalso urge the locking piece I5 toward said plate in order to take upplay and prevent rattle of the parts.

The pivotal movement of the locking piece I5 is partially controlled bya coil spring 48 mounted on a guide rod 49, which rod is pivotallyconnected on pin 50 carried by the locking piece I5, and has itsopposite end 4I!a slidably mounted in an aperture 5| formed at the lowershoulder 52 of cover plate 2|.

The arrangement of spring 48 is such that when the locking piece I5 isswung to one extreme position, as for instance in the locking positionshown in Fig. 4, said spring and its guide rod 49 are swung therewith toone side of a dead center line extending between the shaft 21 and thebottom end of spring 49 where it engages the shoulder 52. The spring 48is normally kept under compression so as to urge the locking member intoits locked position. When the locking piece is swung by manual operationof the handle 26 to unlocked position, an additional compression isimposed on the spring until the latter passes the dead center line,after which said spring assists in completing the swinging movement ofsaid locking piece into its fully Although I have shown and describedone particular embodiment of my invention, it will be understood that Ido not wish to be limited to the exact construction shown and described,but that various changes and modifications may be made without departingfrom the spirit and scope of my invention as defined in the appendedclaim.

I claim as my invention:

In a locking mechanism, a frame including a base plate spaced inparallel relation therewith and a cover plate, a manually operablecontrol shaft rotatably supported in said base plate, a pivotallymovable locking piece fixed on said shaft between said base plate andsaid cover plate and having a portion thereof swingable into extendedlocking position beyond said frame, a pair of pivot pins carried by saidlocking piece and extending on opposite sides of said cover plate, apair of push rods pivotally connected to said pins and extending inopposite directions from said frame, reciprocably movable locking boltsconnected at the outer ends of said push rods so as to be operativesimultaneously with said locking piece, and a leaf spring interposedbetween the outer face of said cover plate and the ends of said pushrods and movable with the latter to yieldingly urge said locking pieceinto bearing engagement with the under face of said cover plate.

AUGIE L. HANSEN.

